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/*

 * Copyright (c) 1982, 1986, 1989, 1993

 *      The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *      @(#)udp_var.h   8.1 (Berkeley) 6/10/93

 * $Id: udp_var.h,v 1.2 2001-09-27 12:01:56 chris Exp $

 */

#ifndef _NETINET_UDP_VAR_H_

#define _NETINET_UDP_VAR_H_

/*

 * UDP kernel structures and variables.

 */

struct  udpiphdr {

        struct  ipovly ui_i;            /* overlaid ip structure */

        struct  udphdr ui_u;            /* udp header */

};

#define ui_next         ui_i.ih_next

#define ui_prev         ui_i.ih_prev

#define ui_x1           ui_i.ih_x1

#define ui_pr           ui_i.ih_pr

#define ui_len          ui_i.ih_len

#define ui_src          ui_i.ih_src

#define ui_dst          ui_i.ih_dst

#define ui_sport        ui_u.uh_sport

#define ui_dport        ui_u.uh_dport

#define ui_ulen         ui_u.uh_ulen

#define ui_sum          ui_u.uh_sum

struct  udpstat {

                                /* input statistics: */

        u_long  udps_ipackets;          /* total input packets */

        u_long  udps_hdrops;            /* packet shorter than header */

        u_long  udps_badsum;            /* checksum error */

        u_long  udps_badlen;            /* data length larger than packet */

        u_long  udps_noport;            /* no socket on port */

        u_long  udps_noportbcast;       /* of above, arrived as broadcast */

        u_long  udps_fullsock;          /* not delivered, input socket full */

        u_long  udpps_pcbcachemiss;     /* input packets missing pcb cache */

        u_long  udpps_pcbhashmiss;      /* input packets not for hashed pcb */

                                /* output statistics: */

        u_long  udps_opackets;          /* total output packets */

};

/*

 * Names for UDP sysctl objects

 */

#define UDPCTL_CHECKSUM         1       /* checksum UDP packets */

#define UDPCTL_STATS            2       /* statistics (read-only) */

#define UDPCTL_MAXDGRAM         3       /* max datagram size */

#define UDPCTL_RECVSPACE        4       /* default receive buffer space */

#define UDPCTL_MAXID            5

#define UDPCTL_NAMES { \

        { 0, 0 }, \

        { "checksum", CTLTYPE_INT }, \

        { "stats", CTLTYPE_STRUCT }, \

        { "maxdgram", CTLTYPE_INT }, \

        { "recvspace", CTLTYPE_INT }, \

}

#ifdef KERNEL

extern struct   inpcbhead udb;

extern struct   inpcbinfo udbinfo;

extern struct   udpstat udpstat;

void     udp_ctlinput __P((int, struct sockaddr *, void *));

void     udp_init __P((void));

void     udp_input __P((struct mbuf *, int));

int      udp_usrreq __P((struct socket *,

            int, struct mbuf *, struct mbuf *, struct mbuf *));

#endif

#endif